package io.mosn.layotto.springboot;

/*
 * Copyright 2021 Layotto Authors
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import io.mosn.layotto.v1.callback.component.pubsub.EventListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import spec.sdk.runtime.v1.domain.pubsub.TopicEventRequest;

import java.lang.reflect.Method;

/**
 * listener for a topic, then invoke toInvokeMethod of this bean
 */
public class LayottoEventListener implements EventListener {
    private static final Logger logger = LoggerFactory.getLogger(LayottoEventListener.class.getName());

    private final Object        bean;
    private final Method        toInvokeMethod;

    public LayottoEventListener(Object bean, Method toInvokeMethod) {
        this.bean = bean;
        this.toInvokeMethod = toInvokeMethod;
    }

    @Override
    public void onEvent(TopicEventRequest request) throws Exception {
        try {
            toInvokeMethod.invoke(bean, request);
        } catch (Exception e) {
            logger.error("layotto subscriber callback method [{}] err:{ }", toInvokeMethod.getName(), e.getMessage());
            throw e;
        }
    }
}
